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PORestKit 0.20 — CoreData: error: Failed to call designated initializer on NSManagedObject class
 

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  1. PORestKit 0.20 — CoreData: error: Failed to call designated initializer on NSManagedObject class
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    <p>I ran into a new problem that I can't seem to find a way around... Here is my RestKit code, following the Twitter Core Data example:</p> <pre><code>// // RESTKIT // // restkit object manager NSString *baseURL = @"http://test1.website.com"; RKObjectManager *objectManager = [RKObjectManager managerWithBaseURL:[NSURL URLWithString:baseURL]]; // enable activity indicator [AFNetworkActivityIndicatorManager sharedManager].enabled = YES; // managed object model NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"AppName" withExtension:@"momd"]; NSManagedObjectModel *managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL]; // NSLog(@"managed object model: %@", managedObjectModel); // managed object store RKManagedObjectStore *managedObjectStore = [[RKManagedObjectStore alloc] initWithManagedObjectModel:managedObjectModel]; objectManager.managedObjectStore = managedObjectStore; // NSLog(@"managed object store: %@", managedObjectStore); // persistent store NSError *error; NSString *storePath = [RKApplicationDataDirectory() stringByAppendingPathComponent:@"AppName.sqlite"]; NSPersistentStore *persistentStore = [managedObjectStore addSQLitePersistentStoreAtPath:storePath fromSeedDatabaseAtPath:nil withConfiguration:nil options:nil error:&amp;error]; if (error) { NSLog(@"unresolved error %@, %@", error, [error userInfo]); abort(); } // NSLog(@"persistent store coordinator: %@", managedObjectStore.persistentStoreCoordinator); // NSLog(@"persistent store: %@", persistentStore); // managed object contexts [managedObjectStore createManagedObjectContexts]; // NSLog(@"managed object context: %@", managedObjectStore.mainQueueManagedObjectContext); // managed object cache managedObjectStore.managedObjectCache = [[RKInMemoryManagedObjectCache alloc] initWithManagedObjectContext:managedObjectStore.mainQueueManagedObjectContext]; // NSLog(@"mangaged object cache: %@", managedObjectStore.managedObjectCache); // // entity mapping // // album entity mapping RKEntityMapping *albumEntityMapping = [RKEntityMapping mappingForEntityForName:@"Album" inManagedObjectStore:managedObjectStore]; albumEntityMapping.identificationAttributes = @[ @"identifier" ]; [albumEntityMapping addAttributeMappingsFromDictionary:@{ @"title" : @"title" }]; // // response descriptor // // album response descriptor [objectManager addResponseDescriptor:[RKResponseDescriptor responseDescriptorWithMapping:albumEntityMapping pathPattern:[NSString stringWithFormat:@"/albums/display/%@/%@", userInfo[@"userID"], userInfo[@"apiKey"]] keyPath:nil statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]]; </code></pre> <p>I'm requesting the information from the API via a UITableViewController class:</p> <pre><code>- (void)loadObjectsFromResourcePath:(NSString *)resourcePath; { [[RKObjectManager sharedManager] getObjectsAtPath:resourcePath parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) { NSLog(@"mapping result: %@", [mappingResult array]); [self stopLoading]; } failure:^(RKObjectRequestOperation *operation, NSError *error) { NSLog(@"error: %@", error); [self stopLoading]; }]; } </code></pre> <p>However, with this code I get the following errors:</p> <pre><code>2012-12-05 17:08:14.830 AppName Alpha[1310:907] I restkit:RKLog.m:34 RestKit logging initialized... 2012-12-05 17:08:15.107 AppName Alpha[1310:907] resource path: albums/display/102/drrrbSAt6RFLsgHaKiiB6kBIyYRyzxLYinL84Kba 2012-12-05 17:08:15.113 AppName Alpha[1310:907] I restkit.support:RKMIMETypeSerialization.m:115 JSON Serialization class 'RKNSJSONSerialization' detected: Registering for MIME Type 'application/json 2012-12-05 17:08:15.118 AppName Alpha[1310:1603] I restkit.network:RKHTTPRequestOperation.m:141 GET 'http://test1.AppName.com/albums/display/102/drrrbSAt6RFLsgHaKiiB6kBIyYRyzxLYinL84Kba' 2012-12-05 17:08:15.122 AppName Alpha[1310:907] error (null), (null) 2012-12-05 17:08:35.333 AppName Alpha[1310:3e13] I restkit.network:RKHTTPRequestOperation.m:158 GET 'http://test1.AppName.com/albums/display/102/drrrbSAt6RFLsgHaKiiB6kBIyYRyzxLYinL84Kba' (200) 2012-12-05 17:08:35.351 AppName Alpha[1310:1507] CoreData: error: Failed to call designated initializer on NSManagedObject class 'AppName Album' 2012-12-05 17:08:35.355 AppName Alpha[1310:1507] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[&lt;AppName 0x1c579380&gt; valueForUndefinedKey:]: the entity (null) is not key value coding-compliant for the key "Title".' *** First throw call stack: (0x39e503e7 0x38ea9963 0x39e500d5 0x371f8d81 0x3276cc1d 0xbf545 0xc00f5 0xc0ab9 0xc44c5 0x32791299 0xb738b 0xb6e5f 0xb7ca5 0xb8343 0xb895b 0x32791299 0xf96ef 0xf8c4b 0x32791299 0x328097f7 0x32c38793 0x32c3c657 0x32c3c7d9 0x3312a7f1 0x3312a684) libc++abi.dylib: terminate called throwing an exception </code></pre> <p>You can take a peak at the returned JSON object here: <a href="http://test1.AppName.com/albums/display/102/drrrbSAt6RFLsgHaKiiB6kBIyYRyzxLYinL84Kba" rel="noreferrer">http://test1.AppName.com/albums/display/102/drrrbSAt6RFLsgHaKiiB6kBIyYRyzxLYinL84Kba</a></p>
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